29. Sources of Magnetic Field
Magnetic Field Produced by Loops and Solenoids
10PRACTICE PROBLEM
A rectangular loop of wire with dimensions of 3.0 m by 2.0 m carries a 20.0 A current. The loop weighs 3.0 kg and is hinged at one edge on a smooth horizontal surface. If the current flows in the direction shown below, what should be the strength of a uniform horizontal magnetic field so that the loop stays at an angle of 30 degrees to the horizontal surface in equilibrium?
![](https://lightcat-files.s3.amazonaws.com/problem_images/19197fffaafba424-1686112000727.jpg)
A rectangular loop of wire with dimensions of 3.0 m by 2.0 m carries a 20.0 A current. The loop weighs 3.0 kg and is hinged at one edge on a smooth horizontal surface. If the current flows in the direction shown below, what should be the strength of a uniform horizontal magnetic field so that the loop stays at an angle of 30 degrees to the horizontal surface in equilibrium?